Drill-grinding machine.



W. G. BURNER. DRILL GRINDING MACHINE. APPLICATION IILBD IBB.18, 1913.

1,109,320, Patented Sept. 1,1914.

iiliiiii [NI/ENTOR Willard C: Burner,

7H: AORRIS PETERS C0,v PHoTbL/Tno WASHINGTON. D C.

W. U. BURNER.

DRILL GRINDING MACHINE.

APPLICATION FILED FEB 1a, 1913.

Patented Sept. 1, 1914.

2 BHEETSSHBET 2.

mmvron VWlord CBurner,

WITNESSES ATIORNEYS YHE .ii/nnls PETEns C07. PI-mrcl LITHO WASHINOION. D II.

WILLARD C. BURNER, OF NEW YORK, N. Y.

DRILL-GRINDING- MACHINE.

Specification of Letters Patent.

Patented Sept. 1, 1914.

Application filed February 18, 1913. Serial No. 745,105.

To all whom it 711 og concern Be it known that I, W ILLARD U. BURNER, a citizen of the United States, and residing at New York, in the county of New York and State of New York", have invented certain new and useful Improvements in Drill- (urrinding Machines, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to machines for grinding drills, and the object thereof is to provide an improved device of this class which is simple in construction and etlicicnt in operation and by means of which the drills are ground on the face of the emery wheel employed, and with this and other objects in view the invention consists in a machine of the class specified constructed as hereinafter described and claimed.

The invention is fully disclosed in, the following specification of which the accompanying drawings form a part, in which the separate parts of my invention are designated by suitable reference characters in each of the views, and in which Figure 1 is a right hand end view of the complete machine looking in the direction of the arrow 1 of Fig. 2, showing part of the construction in section; Fig. 2 a plan view of the machine but showing only part thereof; Fig. 3 a sectional front side view taken on the line 33 of Fig. 1 and also looking in the direction of the arrow 3 of Fig. 2; Fig. at a bottom plan view of a part of the machine as indicated by the arrows t of Figs. 1 and 3; Fig. 5 a section on the line 5 5 of Fig. 1, and Fig. 6 a view similar to Fig. 3, but showin" a modification.

In the practice or my invention I provide the usual main frame or support comprising a base a having a standard a with which is connected, or in connection with which is formed, two bearings o in which is mounted a main shaft a provided between the bear ings c with a power pulley a.

The bearings a consist of bottom members a formed integrally with or connected with the base and standard a, and detachable top members (LT, and on one end portion of the main shaft a is an emery wheel a connected with and rotatable with. the shaft a" in the usual manner, and all these parts are of the usual construction. The front side of the main frame is provided with a supple mental upright frame 5 composed of vertical side members 5 and transverse members 3)", and [i115 supplemental upright frame I) may i be formed integrally with or connected with the main fra1ne,.as may be desired.

Miounted on the front of the supplemental frame 6 is a vertically movable bracket 0 having a tongue and groove connection with said supplemental frame, as shown at 0 and the bracket 0 is provided at the right hand end thereof with a carrier plate a which extends forwardly and on the right hand side of which is a central longitudinal tongue 0* on which is mounted a support 0 having a tongue and groove connection with the plate 0 as shown at c, and the support 0 is provided with parallel top and bottom members and c which extend to the right, and the front right hand corner of the top member (3 is preferably cut away or beveled, as shown at 0", and the bottom member 0 is provided with a segmental slot 0 these features of construction being clearly shown in Figs. 2, 3 and i.

lliounted in the top and bottom members 0 and a of the support 0 is a vertical pin 15 on which is mounted a rotary sleeve (1 provided with an arm d in which is secured an operating shaft (1*, and the arm (Z is provided on the right hand side thereof with a V-shaped head (i in which, in practice, a drill e is placed, and said drill when in position ranges parallel with the shaft (1*, and

the separate side portions of the V-shaped head (i are provided with projecting parallel screws cl" on which is mounted a cross head al adapted to bear on the drill e, and the screws d are provided with thumb nuts (5 the turning of which will force said head into contact with said drill or release said drill according to the direction in which said nuts are turned.

Mounted on the right hand end portion of the main shaft a between the emery wheel a and one of the bearings is a block bearing f on which is mounted an oblong linlrshaped frame F the front end of which is provided with a crank f. The frame is movable forwardly and backwardly on the bearing f, and said bearing is provided with a vertical screw f which passes through the longitudinal slot 7' in the top of the frame F, and mounted on the screw f is a nut f having a handle 7", and by turning said not in one direction the frame f and bearing 7 may he clamped together and the movement of the said frame on said bearing prevented, or said nut may be loosened and the frame adjusted into any desired position on said bearing, and the bearing f and the frame f may be rotated in a vertical plane on the shaft a. The crank arm f at the front end of the frame f is provided with a horizontal head f and the support is provided with a pin 9 which passes through said head.

In the top surface of the plate 0 of the bracket 0 is a longitudinal groove 71, V- shaped in cross section, and mounted on said plate is a block 11 which is held in connection with said plate by screws or similar devices b which are passed therethrough and the head of which is movable in said groove, and said block is provided with a pointer 72? which operates in connection with the scale k on the support and the object of the said pointer and said scale is to enable the operator to properly adjust the support 0 and its connected parts when the emery wheel. a becomes so worn as to necessitate such adjustment, and this adjustment also involves, as will be understood, the adjustment of the frame f on the bearing f through which the shaft (1 passes, and in the operation of grinding a drill, the linkshaped frame f, when in its normal position, or that shown in Figs. 1 and 2, is adjustable on the shaft 12' or hearing f thereon so that the pointer It will indicate on the scale 71, the diameter of the drill to be ground. In other words, if a two inch drill is to be ground, the frame is adjusted on the bearing f until the pointer h is opposite the numeral indicating one inch on the scale it, and it will be seen in Fig. 2, of the drawings, that the centers of the pins (Z and g are in line with the beginning of the scale, or the indication of O on the scale, and in the above adjustment of the frame f the face of the grinding wheel will be set of the diameter of the drill away from the center of the pins (1 and g, or the indication of O on the scale, and it will be understood that hy means of this adjustment, the drill may be ground at the correct or desired angle. I also provide means in connecti on with the operating shaft (2* to adjust the position of the drill 6, these means consisting, first, of a collar 2' slidably mounted on the shaft J and provided with a set screw 2' by which it may be locked in any position, and said collar is prmided with a V-shaped part i which corresponds with the V-sha )ed head (Z and in which the shank of the drill c rests, and in the second place, said means consists of another collar mounted on the shaft (1 and longitudinally adjustable thereon and provided with a set nut j and a sleeve j through which is passed a screw j provided at its inner end with a head j adapted to bear on the end of the drill, and at its oulcr end with a milled head j by which it may be turned. The shaft (17 provided at one side with a key spline or rib is, and this permits of the collars 2' and to be moved longitudinally of said shaft, but prevents the rotation thereof and this holds the head i and the sleeve j in alinement with the head (I of the arm (1". The arm (1 of the sleeve 3" which is mounted on the pin 1] is provided with a downwardly directed pin m, which passes through the groove or segmental slot r in the bottom member r of the support 0 and the said pin m is threaded and pro vided with a loci: nut construction m and a washer m of fiber or any other suitable material, and by means of this construction after the parts 6 and f have been adjusted, as hcreinheforc described, the sleeve (X with its arm (Z and the head a of said arm and the shaft 17* and the drill 6 may be locked in the desired position of adj ustmcnt on the pin (Z so that the pin (Z will he held at the desired angle with reference to the face of the emery wheel a In the operation of this machine, the drill e is first placed in the holder or holders and adjusted into the desired position so that the operating head or end thereof will bear on the face of the wheel a at the proper angle in a horizontal plane passing through the center of the wheel a The bracket 0' and plate 0 are provided with a Web member n which may be used as a handle for 'aising said parts, and in the operation of the machine and at the proper time, said parts are raised. In this operation, the support is moved baekwardly by the crank arm f of the frame f which. turns on the shaft (1 and the drill c rises in a vertical plane, and at the same time moves for\ ardly with the support 0 into the position shown at cm in Fig. 1, and this operation results in the proper grinding of the end of the drill, or the said parts may he again lowered into the position shown in full lines in Fig. 1, and the above described operation may be repeated until the drill or the head thereof, on one side thereof is properly ground, after which the parts A and their connected parts are lowered into a horizontal position, and the drill c is turned in its support that the other side of the head, or the operating end thereof, may be ground. ll will he understood that in order to turn the drill the cross head (I must he loosened. and this operation may be easily performed by loosening the nuts (1 after which the said cross head may be again tightened, and during these operations the drill a may be moved forwardly or adjusted forwardly by means of the screw f.

In Fig. 2 of the accompanying drawing nroaeae the drill e and shaft ii are shown in their operative position in full lines, this position being at an angle to the plane of the wheel a but said parts are also shown in another position in dotted lines, and it is the dotted line position of theseparts in Fig. 2 which corresponds with theposition of said parts shown in Figs. 1, 3 and 4, or in other words, the position of said parts shown in Flgs. 1, 3 and 4, is that indicated in dotted lines in Fig. 2, and in this position of said parts they are in planes parallel with the central plane of the wheel a The construction shown in Fig. 6 is exactly the same as that shown in Fig. with the exception that the cross head d is pro vided with a central inwardly directed tongue d which is V-shaped in form at its inner end and provided with a V-shaped recess al and the object of this construction is to provide means for holding a small drlll one of which is shown at e in said figure.

As hereinbefore stated, one of the chief features of my improvement is to provide a machine by which adrill may be ground on the face of the wheel a and a further object of said improvement is to provide means for moving the drill in a vertical plane over the face of the wheel at an angle thereto, and at the same time moving said drill longitudinally and forwardly so that the angle at which the head of the drill bears on the face of said wheel will turn or change and thus produce the beveled or rounded grinding of said head of the drill, shown at 61 in Fig. 1, and it will be seen that the link-shaped frame f and its connected parts is a very important feature of my invention and permits of the hereinbefore described adjustment.

The dotted circle X shown in Fig. 1, represents the arc of a circle through which the head of the drill passes as it is moved in a vertical plane, and this circle is of the same diameter as the wheel a.

In the foregoing specification I have shown and described the preferred construc tion of my invention, but my invention is not limited to the details thereof as herein shown and described, and changes therein and modifications thereof may be made within the scope of the appended claims without departing from the spirit of the invention or sacrificing its advantages.

Although I have described the wheel a? as an emery wheel, it will be apparent that a wheel of any desired material may be substituted therefor.

Having fully described my invention what I claim as new and desire to secure by Letters Patent is 1. In a machine for grinding drills, a main frame, a shaft mounted thereon, a grinding wheel secured to said shaft, a member movable vertically on a supplemental frame, a support movable horizontally on said member, a drill holder pivoted to said support, an adjustable link-shaped frame mounted on a bearing on said i shaft and rotatable therewith in the operation of grinding a drill.

2. In a machine for grinding drills, a main frame, a shaft mounted thereon, a grinding wheel secured to said shaft, a member movable vertically 011 a supplemental frame, a support movable horizontally on said member, a drill holder pivoted to said support, an adjustable link-shaped frame mounted on a bearing on said shaft and rotatable therewith in the operation of grinding a drill, and. means on said vertically and horizontally movable parts for regulating the proper angle for grinding said drill in relation to the face of said' grinding wheel.

3. In a drill grinding machine, a main and supplemental frame, a shaft mounted in the main frame and to which is secured a grinding wheel, a member vertically movable on the supplemental frame, a support horizontally movable on said member, a drill holder pivotally secured to said sup port, a link-shaped frame adjustably mounted on a bearing on said shaft and one end of which is pivoted to the horizontally movable support, and means on said vertically and horizontally movable parts whereby the adjustment for grinding a drill at its proper angle may be accomplished in relation to the grinding wheel.

a. In a drill grinding machine, a main and supplemental frame, a shaft mounted in the main frame to which is secured a grinding wheel, a member vertically movable on the supplemental frame, a support horizontally movable on said member, a drill holder pivotally secured to said support, a link-shaped frame adjustably mounted on a bearing on said shaft and one end of which is pivoted to the horizontally movable support, and means on said vertically and horizontally movable parts whereby the adjustment for grinding a drill at its proper angle may be accomplished in relation to the grinding wheel, and means in connection with said drill holder for moving said drill forwardly in the operation of grinding the same.

5. In a drill grinding machine, a main frame, a shaft mounted therein, a grinding wheel secured thereto, a bearing mounted on said shaft on which is placed an adjustable linl sl1aped frame, a member vertically movable on a supplemental frame, a sup port pivoted to said link-shaped frame and horizontally movable on said member, a drill holder pivotally and adjustably secured to said support the shaft of which is provided with means for adjusting a drill forwardly in said holder, and means on said vertically and horizontally movable parts for adjusting the relation thereof in connection with said grinding wheel so that the proper angle of a drill can be obtained in the operetion of grinding the same.

6. In a machine for grinding drills, a main frame, a, rotatable shaft mounted therein and provided with a grinding Wheel, a vertically movable bracket connected with the main frame, a forwardly and back Wardly adjustable support connected with said bracket, :1 frame rotatable on the main shaft and rotatably connected with said support; and a drill holder mounted in said support and adapted to hold a drill so that the head thereof will bear on the face of the grinding wheel.

I T. In a drill grinding machine, a rotatable 9; left 5 presence of 17th day of February 1913. provided with a. grinding Wheel, and devices for holding a drill so that the head thereof to be ground will bear entire face i of said Wheel, and for moving said drill up- Wardly and forwardly around a section of moe azo the oiroumference of operation.

8. In a machine for grinding drills, a main frame, a rotatable shaft meunted therein and provided with a grinding Wheel, a vertically moving member mounted on the main frame, a forwardly and backwardly movable support mounted on said member, and a link-shaped frame adjustably connected with said rotatable shaft, an adjust:- able drill holder connected with said support and adapted to hold a drill so that the SZtid wheel during said head thereof will bear on the face of said Wheel at an angle to the plane thereof.

In testimony that I claim the foregoing as my'invention I have signed my name in the subscribing Witnesses this WILLARD O. BU RNER.

Witnesses C. MULREANY, S. ANDREWS.

We: oflhia patent may be obtained for five cents each, by addressing the Gomnrissioner of Patents,

wuhlngton, D. 0. 

